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Abstract:
The region of the "knee" of the primary spectrum is studied by
EAS-TOP (2000 m a.s.l., Gran Sasso Laboratories) in the e.m.
(Ne) and muon components at Emu > 1 GeV (Nmu/GeV) at the surface
and Emu > 1.3 TeV (Nmu/TeV) in correlation with the detectors
operating in the underground Gran Sasso laboratories (LVD, MACRO).
The status of the analysis and the main results are discussed.